True. On my '49, there is no way to pull the engine and transmission at the same time, because there is a frame cross-member between them. I can (and did) pull the engine, without pulling the transmission, but I first needed to support the transmission from the under side. Supporting the transmission is essential because the front of the transmission is supported by the engine, not the frame.
Use the eye-bolts and chains described above to carry 95% of the engine load. In addition, I recommend attaching an adjustable strap to the front of the engine. This will allow you to tip the engine along the axis of the crankshaft. Tipping the engine to match the angle of the transmission shaft is critical when you reinstall the engine.